Regular preventive maintenance (PM) service is one of the best ways to avoid breakdowns, expensive repairs, and unsafe towing conditions. Whether you haul every day or only occasionally, trailers experience wear from miles, heavy loads, weather, and sitting unused.
So how often should your trailer be serviced?
The answer depends on how often you use it, what you haul, and the type of trailer you own.
General PM Service Guidelines
For most trailers, a good rule of thumb is:
Heavy Commercial Use
Every 3–6 months
Trailers used daily or under heavy loads should be inspected more often.
Examples:
- Equipment trailers
- Dump trailers
- Hotshot trailers
- Construction trailers
- Commercial hauling trailers
Frequent use creates faster wear on brakes, bearings, suspension, and tires.
Moderate Use
Every 6–12 months
For trailers used regularly but not daily.
Examples:
- Utility trailers
- Enclosed cargo trailers
- Car haulers
- Landscaping trailers
An annual inspection may be enough depending on mileage and usage.
Light or Occasional Use
At least once per year
Even trailers that sit can develop problems from:
- Dry rot
- Corrosion
- Bearing contamination
- Weak batteries
- Stuck brakes
Lack of use can be just as hard on a trailer as overuse.
What Should Be Checked During PM Service?
A proper trailer PM inspection should include:
Bearings & Hubs
Inspect for:
- Bearing wear
- Proper grease or oil levels
- Leaking seals
- Hub heat issues
Neglected bearings are one of the most common causes of roadside failures.
Brakes
Inspect:
- Brake shoes or pads
- Magnets (electric brakes)
- Drums or rotors
- Hydraulic components
- Brake adjustment
Weak brakes often go unnoticed until an emergency stop is needed.
Suspension
Check:
- Leaf springs
- Equalizers
- Shackles
- Wet bolts
- Bushings
- U-bolts
Worn suspension can lead to uneven tire wear and poor towing performance.
Tires & Wheels
Inspect for:
- Uneven wear
- Dry rot
- Proper inflation
- Cracks
- Loose lug nuts
Tire issues are one of the most common trailer failures.
Wiring & Lights
Check:
- Trailer lights
- 4-way or 7-way plug
- Junction box connections
- Wiring damage
- Grounds
Electrical problems are much easier to fix before they fail on the road.
Coupler & Safety Equipment
Inspect:
- Coupler wear
- Safety chains
- Breakaway system
- Jack operation
These are critical safety components.
Hydraulic Systems (If Equipped)
For dump trailers or hydraulic equipment:
Inspect:
- Pump operation
- Fluid levels
- Hoses
- Cylinders
- Battery condition
Signs You Should Service Your Trailer Sooner
Don’t wait for a scheduled PM if you notice:
- Uneven tire wear
- Poor braking
- Noisy suspension
- Hub heat
- Flickering lights
- Hydraulic issues
- Trailer pulling poorly
Small problems often turn into expensive repairs if ignored.
Seasonal Service Is a Smart Idea
Many trailer owners schedule PM service:
- Before heavy hauling season
- Before long trips
- After winter storage
- Before DOT inspections
Catching issues early saves time and money.
Preventive Maintenance Costs Less Than Repairs
A routine PM inspection is almost always cheaper than:
❌ Bearing failure on the highway
❌ Brake failure
❌ Tire blowouts
❌ Suspension damage
❌ Electrical issues
Preventive maintenance helps reduce downtime and improve safety.
Keep Your Trailer Road-Ready
No matter what type of trailer you own, routine PM service helps extend trailer life and reduce costly breakdowns.
At Highway Trailer Company, our service team can inspect brakes, bearings, suspension, wiring, hydraulic systems, tires, and safety components to help keep your trailer hauling safely and reliably year-round.